Bell Atlantic Electronic Publishing expanded InfoTravel, its electronic Yellow Pages for hotels, to Holiday Inn properties in Bethesda, Md., and Alexandria, Va., bringing the total to 5,100 rooms in nine hotels, up from 4,700 rooms in seven hotels. InfoTravel users key in numerical codes on the TV remote control to get information from advertisers. Coupons and maps can be printed out at the front desk. The system is based on CD-i technology from Phillips. InfoTravel has 100 advertisers.